John T. Griesmer

activity

20082026

most citedRecurrence, rigidity, and popular differences

12 citations · 29 across the 19 of their papers we have counts for

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2 papers · 1 filter

math.DS2026

Bohr sets in sumsets III: expanding difference sets and almost Bohr sets

Pierre-Yves Bienvenu, John T. Griesmer, Anh N. Le +1

Let $G$ be a discrete abelian group. Følner showed that if $A \subseteq G$ has positive upper Banach density, then $A - A$ contains an almost Bohr set -- a set of the form $B \setm…

math.CO2026

Kneser- and Jin-type inverse theorems in discrete abelian groups

John T. Griesmer

We characterize the pairs of sets $A, B$ in an arbitrary (countable or uncountable) discrete abelian group $Γ$ satisfying $m ~ (A + B) < m ~ (A) + m ~ (B)$ , where $\tilde{…